"The default mode is when you ruminate, think about yourself, or daydream," says study researcher Judson Brewer, MD, PhD, medical director of the Yale Therapeutic Neuroscience Clinic. "Everybody has it, but experienced meditators have a different type."

Brewer found that people who meditate are able to link up other parts of their brains to monitor activity in the default mode network that tell them to get back on task when distractions arise and be present in the moment.

The study is published in the Proceedings of the National Academy of Sciences.

Experts say the results help explain the benefits of meditation on concentration and open the door to future research using meditation to treat and potentially prevent a variety of psychiatric and neurological disorders.

Meditation Modifies Brain Networks

In the study, researchers used functional magnetic resonance imaging (fMRI) to analyze brain activity in 12 experienced meditators (more than 10 years of experience practicing mindfulness meditation) and 12 novice meditators. The scans were done as they practiced three different types of mindfulness meditation as well as at rest.

The results showed that experienced meditators had less activity in the default mode network, regardless of the type of meditation they practiced.

In addition, the scans showed that when the default mode network was active, other brain regions responsible for self-monitoring and thought control were also activated in experienced, but not novice meditators.

"This new default mode in meditators has these other components that are monitoring and telling you to get back on task and be present," Brewer tells WebMD.